Because they were also kept out of the schools that would give them the qualifications to work those jobs. No cost savings if your engineer or accountant was never trained. So companies hired them for the menial jobs which paid less universally.
Not that there were zero, just that they were rare due to entry barriers. If you have evidence to the contrary I would love to see it rather than listen to your pathetic attempt at a clever put down.
I don't know, but I don't find it hard to furnish ideas. Colleges used to try to ensure they didn't produce more professionally qualified graduates than there were entry-level positions for. Perhaps colleges only graduated fewer black students than there were openings in black-owned enterprises?
